Jeff Gronstal, 50, was booked into the Polk County Jail on Thursday night for OWI.

A Polk County Sheriff's Office report shows the arrest happened at 1:10 a.m. Friday in the 4700 block of Aurora Avenue. A deputy started following the pickup and noticed it had an expired registration tag.

"He noticed an odor of alcohol when speaking with the driver," said Polk County Sheriff spokeswoman Jana Abens.

Gronstal performed several field sobriety tests and the deputy noticed he had trouble keeping his balance. According to the incident report, Gronstal said he had several health issues due to cancer, some that would inhibit his abilities during the tests.

He was arrested and taken to the Polk County Jail. Gronstal later refused a second blood alcohol test.

"That is a personal decision that each individual is allowed to make," said Abens.

Gronstal was charged with first-offense OWI, possession of drug paraphernalia and operating without registration. The report said Gronstal had a brown pipe with marijuana residue.

State officials said they are looking into the case.

Gronstal holds the job title of health facility officer 1 and has been with the state for 25 years.